Ow, my brain hurts

Certainly after this game. Essaying the well known "Monkey's Bum" variation I got into a joyless position after 11.d5. But the real brain strain came on move 14 when after a long think I decided that 14.f4 just had to be played. Of course it was unsound, but it almost worked, especially after my opponent declined the opportunity to win a piece.

Press, Shaun v Lattimore, Tor
ANU Spring Open 2007
1.e4 c6 2.d4 g6 3.Nc3 d6 4.Bc4 Bg7 5.Qf3 e6 6.Nge2 Nf6 7.Bg5 h6 8.Bh4 Nbd7 9.0-0-0 Qe7 10.Rhe1 e5 11.d5 c5 12.h3 a6 13.a4 Qd8 14.Qe3 Qa5 (D)
15.f4 b5 16.axb5 Nb6 17.Ba2 axb5 18.fxe5 dxe5 19.Qxc5 Nbd7 20.Qc6 0-0 21.Bb3 b4 22.Na2 Ba6 23.Bxf6 Nxf6 24.Ng3 Rfc8 25.Qa4 Qxa4 26.Bxa4 Bc4 27.b3 Rxa4 28.bxa4 Bxa2 29.Kb2 Bc4
and my opponent managed convert his advantage, so 0-1 after another 30 moves